Transfusion auxiliary device for transfusion bag and construction method of temperature and pressure control model

Abstract

The invention provides an infusion auxiliary device for an infusion bag and a construction method of a temperature and pressure control model, and belongs to the technical field of medical auxiliary instruments. The infusion auxiliary device for the infusion bag comprises a bag-shaped body, a pressurizing part, a pressure sensor, a heating part, a first temperature sensor, a second temperature sensor, a temperature and pressure preset assembly, a control part, a display screen and a power supply part. According to the infusion auxiliary device for the infusion bag, after the infusion speed and temperature are preset, the infusion bag is indirectly pressurized / heated through the pressurizing piece and the heating piece, and the whole process is automatically processed according to a preloaded temperature and pressure control model by receiving related pressure / temperature signals and preset temperature / infusion speed signals through the control part; related temperature and infusion rate data are visually displayed through the display screen. According to the method, the empirical model of the three variables is fitted through the relation among the actually measured temperature value, pressure value and infusion rate value, and compared with a theoretical model calculated through a physical method, the accuracy is high, and implementation is easy.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical auxiliary equipment, and in particular relates to an infusion auxiliary device for an infusion bag and a method for constructing a temperature and pressure control model. Background Art

[0002] At present, clinical intravenous infusion adopts disposable infusion sets and mostly adopts infusion bags. However, in clinical practice, it is often encountered that special critically ill patients need to speed up the infusion speed during rescue or treatment, and when the regulating valve is opened to the maximum, the flow rate cannot meet the requirement, which brings great inconvenience to the rescue and treatment work; at the same time, for patients with special conditions (shock patients, elderly and weak patients, patients with heavy blood loss, etc.) and / or at a low ambient temperature, the process of injecting the lower temperature liquid in the infusion bag into the patient's vein may cause the patient to have hypothermia symptoms (hypothermia), which in turn poses a certain risk to the patient's life safety.

[0003] In order to solve the above problems, the methods / devices commonly used at present are as follows:

[0004] (1) Use a warm water bath to preheat the infusion bag to be used so as to increase the infusion temperature of the infusion bag; a dedicated person squeezes the infusion bag to speed up the infusion rate of the infusion bag.

[0005] (2) Referring to the prior art Chinese patent CN112245710A, a disposable infusion bag with an interlayer is used, and the gas generated by the reaction between chemical agents quickly inflates the interlayer of the disposable infusion bag to pressurize the liquid in the infusion bag and accelerate the infusion rate.

[0006] (3) Referring to the prior art Chinese patent CN105411846A, an electric heating layer is arranged around the periphery of the infusion bag to heat the liquid medicine in the infusion bag.

[0007] (4) Referring to the prior art Chinese patent CN112089925B, an automatically blocked heating and pressurized infusion device is used, wherein the temperature is controlled by wrapping a heater and a temperature sensor in the middle section of the infusion tube, and the pressure of the infusion bag wrapped inside is increased by pressurizing the pressurized bag, thereby increasing the flow rate of the infusion bag.

[0008] However, the methods / devices for accelerating the infusion rate of the infusion bag and increasing the infusion temperature under the above prior art have the following problems:

[0009] (1) The method of heating the infusion bag in a warm water bath and squeezing the infusion bag is time-consuming and laborious; the preheated infusion bag will gradually cool down over time, and there is still a risk of causing hypothermia symptoms in the patient receiving the infusion; the method of squeezing the infusion bag cannot accurately match the infusion rate.

[0010] (2) Chinese patent CN112245710A is a disposable pressurized infusion bag, which cannot be reused, wastes resources, and is not environmentally friendly. Its pressurization method (the gas generated by the chemical reaction quickly inflates the interlayer of the infusion bag to pressurize the liquid in the infusion bag) is too rapid, and the pressurization amplitude during the pressurization process is uncontrollable, and it is impossible to maintain stable pressurized infusion for a long time. At the same time, the pressure increase of the device and the degree of enhancement of the infusion rate of the infusion bag cannot be intuitively displayed. Since the gas generated by the chemical reaction is a fixed amount, the pressurization amplitude is also a fixed value, which is only applicable to specific infusion scenarios. It is impossible to change the pressurization amplitude of the infusion bag according to the actual physical condition and urgency of the patient, nor can it adjust the accelerated infusion rate of the infusion bag. At the same time, the device does not have a heating function.

[0011] (3) The Chinese patent CN105411846A provides a heatable infusion bag, which is a disposable product and is discarded after the infusion is completed, resulting in serious waste of resources. The device can only adjust the heating power, but cannot visually observe the actual heating temperature of the infusion bag, resulting in the inability to match the heating power and the heating temperature, which makes it difficult to accurately adjust the heating temperature of the infusion bag. At the same time, the device does not have a pressurization function.

[0012] (4) Chinese patent CN112089925B controls the temperature by wrapping a heater and a temperature sensor in the middle section of the infusion tube. When the infusion rate is too fast, the heater wrapped in the middle section of the infusion tube often cannot efficiently heat the liquid medicine in the infusion tube, resulting in a certain difference between the actual infusion temperature and the expected temperature. In addition, since the heater is wrapped in the middle section of the infusion tube (it cannot be wrapped at the end of the infusion tube, which will affect the patient's intravenous needle insertion), the middle section of the infusion tube is still a certain distance away from the patient's intravenous end, and temperature loss will still occur in this distance. At the same time, the device cannot set an accurate infusion temperature and an accurate infusion rate, nor can it correlate and match the infusion temperature and the infusion rate (when the infusion rate is different, the temperature loss in the infusion tube is different). Summary of the invention

[0013] The present invention is made to solve the above-mentioned problems, and its purpose is to provide an infusion auxiliary device for an infusion bag and a method for constructing a temperature and pressure control model.

[0014] The present invention provides an infusion auxiliary device for an infusion bag, which has the following characteristics: a bag-shaped body, one end of which has an opening along the axial direction, for the infusion bag to be embedded therein, and the other end of which has a through hole, for the infusion port of the infusion bag to pass through; a pressurizing member, connected to the bag-shaped body, for adjustable pressurization of the infusion bag embedded in the bag-shaped body, with a pressurizing power of w1; a pressure sensor, arranged inside the bag-shaped body, for real-time measurement of the pressure on the infusion bag and outputting a corresponding pressure signal P输液袋 ; A heating element connected to the bag-like body, used for power-adjustable heating of the infusion bag embedded in the bag-like body, and its heating power is w2; A first temperature sensor, arranged inside the bag-like body, used for real-time measurement of the temperature of the infusion bag and outputting a corresponding first temperature signal T2; A second temperature sensor, used for real-time measurement of the room temperature of the bag-like body and outputting a corresponding second temperature signal T3; A temperature and pressure preset component, including a temperature preset element and a pressure regulating element, which are respectively used for the user to adjust the preset temperature T1 of the drug solution in the infusion bag when it enters the patient's vein and the preset infusion rate v of the infusion bag 预设 ; A control unit is connected to the pressurizing element, the pressure sensor, the heating element, the first temperature sensor, the second temperature sensor and the temperature and pressure preset component. The control unit stores a temperature and pressure control model in advance. The temperature and pressure control model is based on v 预设 and P 输液袋 Control the size of w1 so that the actual infusion rate of the infusion bag reaches v 预设 The temperature and pressure control model is based on T1, T2, T3 and P 输液袋 Control the size of w2 so that the actual temperature of the liquid in the infusion bag when it is delivered to the patient's vein reaches T1; the display screen is connected to the control unit and is used to display v in real time 预设 , specific values ​​of T1, T2 and T3; and a power supply unit, which is connected to each power consumption unit of the infusion auxiliary device for the infusion bag and supplies power to it.

[0015] In the infusion auxiliary device for the infusion bag provided by the present invention, it can also have the following characteristics: wherein, each of the two axial side surfaces of the bag-like body has a hollow interlayer, and the two hollow interlayers form a first airbag and a second airbag respectively, and the pressurizing member is an air pump, which is connected to the first airbag and / or the second airbag, and is used to inflate air therein so that the two axial side surfaces of the bag-like body expand, thereby squeezing the infusion bag.

[0016] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: the first airbag and the second airbag are not connected to each other, the first airbag and the second airbag are respectively connected to the air pump through pipelines, and are pressurized by the air pump.

[0017] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following characteristics: the first airbag and the second airbag are connected through at least one passage passing through the bag-shaped body layers, and at least one of the first airbag or the second airbag is connected to the air pump through a pipeline.

[0018] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: wherein the heating element includes heating wires, which are evenly and densely distributed on the two axial side surfaces inside the bag-like body, and are used to heat the infusion bag embedded in the bag-like body.

[0019] In the infusion auxiliary device for the infusion bag provided by the present invention, it can also have the following characteristics: wherein, the heating element also includes a heat-spreading film, which is arranged on the two axial side surfaces inside the bag-like body and covers the surface of the electric heating wire. When the infusion bag is embedded in the bag-like body, the two heat-spreading films are covered on the two axial side surfaces of the infusion bag. The heat-spreading films are used to evenly conduct the heat generated by the electric heating wire to the medicine in the infusion bag. The first temperature sensor is arranged on the side of the heat-spreading film that contacts the infusion bag, and the second temperature sensor is not in direct contact with the bag-like body.

[0020] The infusion auxiliary device for an infusion bag provided by the present invention may also have the following features: wherein the display screen, the temperature preset component, the pressure regulating component, the second temperature sensor and the control unit are integrated on the same operating unit.

[0021] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: wherein, at least a portion of the bag-like body is a transparent area for medical staff to observe the delivery of the medicine in the infusion bag in real time, and the bag-like body has an open end with a hanging ring for hanging at a desired position.

[0022] The present invention also provides a method for constructing a temperature and pressure control model, which has the following characteristics and is used to construct any of the above-mentioned temperature and pressure control models, comprising the following steps: S10, selecting an infusion bag of fixed volume and its corresponding infusion tube of fixed length and diameter; S20, obtaining the actual infusion rate v of the infusion bag through actual measurement. 实际 The pressure P 输液袋 , and then 实际 and P 输液袋 The multiple corresponding numerical values ​​of P are fitted to obtain a smooth curve relationship P 输液袋 =f1(v 实际 ), since the temperature and pressure control model controls the pressure amplitude of the pressurizing part, the actual infusion rate v 实际 With the preset infusion rate v 预设 The same, so when v 预设 The preset pressure value of the corresponding infusion bag is less than P 输液袋 When P, the pressurized part needs to be continuously pressurized, so the pressure control method of the temperature and pressure control model can be obtained, that is: 输液袋 <f1(v 预设 ), w1>0; S30, the temperature loss during the process of delivering the liquid in the infusion bag to the patient's vein via the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and control the single factor variable to conduct multiple groups of actual tests, and obtain the relationship between ΔT and v 实际 , T2 and T3 and fit them to obtain a smooth four-dimensional surface relationship ΔT = f2 (v 实际,T2,T3); S30, w2 is determined by the preset temperature T4=T1+ΔT and T2 of the infusion bag, and multiple groups of actual tests are performed by controlling the single factor variable to obtain multiple groups of corresponding values ​​of w2 and ΔT, T1 and T2 and fit them to obtain a smooth four-dimensional surface relationship w2=f3(ΔT,T1,T2), then w2=f3(ΔT,T1,T2)=f3[f2(v 实际 ,T2,T3),T1,T2], T4>T2; S50, the temperature and pressure control model is constructed:

[0023] In the above formula, v 实际 By P 输液袋 =f1(v 实际 ) is calculated in reverse order.

[0024] The method for constructing the temperature and pressure control model provided by the present invention may also have the following feature: wherein, in steps S10 to S30, multiple groups of corresponding numerical values ​​are fitted using MATLAB software.

[0025] Functions and Effects of the Invention

[0026] According to the infusion auxiliary device for infusion bag and the method for constructing the temperature and pressure control model involved in the present invention, the infusion auxiliary device for infusion bag comprises: a bag-shaped body, one end of which has an opening along the axial direction for the infusion bag to be embedded therein, and the other end has a through hole for the infusion port of the infusion bag to pass through; a pressurizing member connected to the bag-shaped body, used to perform adjustable pressurization on the infusion bag embedded in the bag-shaped body, and the pressurization power is w1; a pressure sensor, which is arranged inside the bag-shaped body, and is used to measure the pressure on the infusion bag in real time and output a corresponding pressure signal P 输液袋 ; A heating element connected to the bag-like body, used for power-adjustable heating of the infusion bag embedded in the bag-like body, and its heating power is w2; A first temperature sensor, arranged inside the bag-like body, used for real-time measurement of the temperature of the infusion bag and outputting a corresponding first temperature signal T2; A second temperature sensor, used for real-time measurement of the room temperature of the bag-like body and outputting a corresponding second temperature signal T3; A temperature and pressure preset component, including a temperature preset element and a pressure regulating element, which are respectively used for the user to adjust the preset temperature T1 of the drug solution in the infusion bag when it enters the patient's vein and the preset infusion rate v of the infusion bag 预设 ; A control unit is connected to the pressurizing element, the pressure sensor, the heating element, the first temperature sensor, the second temperature sensor and the temperature and pressure preset component. The control unit stores a temperature and pressure control model in advance. The temperature and pressure control model is based on v 预设 and P 输液袋 Control the size of w1 so that the actual infusion rate of the infusion bag reaches v 预设 The temperature and pressure control model is based on T1, T2, T3 and P输液袋 Control the size of w2 so that the actual temperature of the liquid in the infusion bag when it is delivered to the patient's vein reaches T1; the display screen is connected to the control unit and is used to display v in real time 预设 , T1, T2 and T3; and a power supply unit connected to each power consumption unit of the infusion auxiliary device for the infusion bag and supplying power to it. At the same time, the method for constructing the temperature and pressure control model of the present invention obtains an actual empirical model between the three variables by actually measuring the relationship between the temperature value, the pressure value and the infusion rate value and fitting, thereby constructing the temperature and pressure control model.

[0027] Therefore, the infusion auxiliary device for infusion bag and the method for constructing the temperature and pressure control model of the present invention have the following advantages:

[0028] Beneficial effects:

[0029] (1) The infusion bag embedded therein can be automatically pressurized, thereby increasing the infusion rate of the infusion bag until the rate reaches a value preset by the user. The system has a high degree of automation and does not require manual pressurization. It is suitable for different infusion scenarios, thereby changing the pressurization amplitude of the infusion bag according to the patient's actual physical condition and degree of urgency, thereby quickly adjusting the infusion rate of the infusion bag.

[0030] (2) It can automatically heat the infusion bag embedded therein, thereby increasing the infusion temperature of the infusion bag until the temperature reaches the value preset by the user, with a high degree of automation. It is also suitable for different infusion scenarios (different ambient temperatures and patient physical needs), thereby adjusting different heating temperatures and effectively preventing patients from experiencing hypothermia symptoms.

[0031] (4) The display screen allows the user to observe the infusion bag's infusion speed, infusion temperature, ambient temperature and other values ​​in real time.

[0032] (5) The pressure P actually applied to the infusion bag by the pressurizing power w1 and heating power w2 of the infusion auxiliary device for the infusion bag 输液袋 Combined together, real-time feedback is provided between the heating and pressurizing processes and corresponding power changes are made, making the heating and pressurizing (accelerating the infusion rate of the infusion bag) process of the infusion auxiliary device for the infusion bag more precise and with smaller errors.

[0033] (6) The method of constructing a temperature and pressure control model by actually measuring the relationship between temperature, pressure and infusion rate and fitting the actual empirical model between the three variables has high practical application significance. Compared with the theoretical model calculated by physical methods, the model obtained by fitting after actual measurement has higher accuracy, and its reliability can be further improved as the amount of test data increases. At the same time, the method of constructing the temperature and pressure control model is simple and easy to implement, and does not need to rely on complex theoretical calculations.

[0034] (7) The construction method of the temperature and pressure control model is to convert the heating power and the pressurizing power into the actual pressure P of the infusion bag. 输液袋 Combined together, the heating and pressurizing processes of the infusion auxiliary device for the infusion bag can provide real-time feedback to each other and make corresponding power changes, making the heating and pressurizing (accelerating the infusion rate of the infusion bag) process of the infusion auxiliary device for the infusion bag more precise and with smaller errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a structural assembly perspective view of an infusion auxiliary device for an infusion bag according to embodiment 1 of the present invention;

[0036] Figure 2 is a structural exploded view of an infusion auxiliary device for an infusion bag according to Embodiment 1 of the present invention;

[0037] Figure 3 is a schematic diagram of the connection relationship of the control unit of Example 1 of the present invention;

[0038] Figure 4 yes Figure 1 A corresponding stereogram from another angle;

[0039] Figure 5 is a schematic diagram of a radial cross-section of the infusion auxiliary device for an infusion bag of Example 1 of the present invention at a certain axial depth;

[0040] Figure 6 yes Figure 5 The enlarged view of point A in the middle;

[0041] Figure 7 is a schematic diagram of a radial cross section of the infusion auxiliary device for an infusion bag of Example 1 of the present invention at another axial depth;

[0042] Figure 8 yes Figure 7 The enlarged view of point B in the middle;

[0043] Fig. 9 is a cross-sectional view of the infusion auxiliary device for an infusion bag according to embodiment 1 of the present invention taken along the axial direction;

[0044] Fig.10 yes Fig. 9 Enlarged view of point C in the middle;

[0045] Fig.11 yes Figure 1 The enlarged view of point D in the middle;

[0046] Fig.12 yes Figure 1 Enlarged view of point E in the middle;

[0047] Fig.13 It is a structural assembly perspective view of an infusion auxiliary device for an infusion bag according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the method for constructing an infusion auxiliary device for an infusion bag and a temperature and pressure control model of the present invention.

[0049] <Example 1>

[0050] Figure 1 is a structural assembly perspective view of an infusion auxiliary device for an infusion bag according to embodiment 1 of the present invention; Figure 2 is a structural exploded view of an infusion auxiliary device for an infusion bag according to Embodiment 1 of the present invention; Figure 3 It is a schematic diagram of the connection relationship of the control unit of Example 1 of the present invention.

[0051] like Figure 1 to Figure 3 As shown, this embodiment provides an infusion auxiliary device 100 for an infusion bag, including a bag-shaped body 10, a pressure regulating part 20, a temperature regulating part 30, a detection part 40, a control part 50, a display screen 60 and a power supply part (not shown in the figure).

[0052] Figure 4 yes Figure 1 A corresponding stereogram from another angle; Figure 5 is a schematic diagram of a radial cross-section of the infusion auxiliary device for an infusion bag of Example 1 of the present invention at a certain axial depth; Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0053] like Figure 1 to Figure 6 As shown, the bag-like body 10 is a hollow transparent bag-like structure having an opening 10a, a through hole 10b, a hanging ring 10c, a first air bag 10d and a second air bag 10e.

[0054] The opening 10a is located at one end of the bag-shaped body 10 along the axial direction, and is used for an infusion bag to be embedded therein.

[0055] The through hole 10b is located at the other end of the bag-shaped body 10 along the axial direction, and is used for the infusion port of the infusion bag to pass through.

[0056] The hanging ring 10c is located at one end of the bag-like body 10 having the opening 10a, and is used for hanging the entire bag-like body 10 at a desired position.

[0057] The two axial side surfaces of the bag-shaped body 10 each have a hollow interlayer, and the two hollow interlayers form a first airbag 10d and a second airbag 10e respectively.

[0058] Figure 7 is a schematic diagram of a radial cross-section of the infusion auxiliary device for an infusion bag of Example 1 of the present invention at another axial depth; Figure 8 yes Figure 7 The enlarged view of point B in the middle; Fig. 9 is a cross-sectional view of the infusion auxiliary device for an infusion bag according to Embodiment 1 of the present invention taken along the axial direction; Fig.10 yes Fig. 9 Enlarged view of point C in the middle.

[0059] like Figures 1 to 10 As shown, the first airbag 10d and the second airbag 10e are connected through two passages 10f penetrating between the layers of the bag-shaped body 10, so that the pressures in the first airbag 10d and the second airbag 10e are balanced with each other.

[0060] Fig.11 yes Figure 1 Enlarged view of point D in the middle.

[0061] like Figures 1 to 11 As shown, the pressure regulating part 20 includes a pressure applying member 21 , a pipeline 22 and a pressure regulating member 23 .

[0062] The pressurizing member 21 is an electric air pump, and is connected to the first airbag 10d through a pipe 22 passing through the bottom of the bag-shaped body 10, so as to pressurize the first airbag 10d. The pressurizing power of the pressurizing member 21 is w1.

[0063] The pressure regulating member 23 is integrated on the operating unit 70. The pressure regulating member 23 has an infusion rate increasing button 23a and an infusion rate decreasing button 23b, which are respectively used to increase or decrease the preset infusion rate v of the infusion bag. 预设 .

[0064] Fig.12 yes Figure 1 Enlarged view of point E in the middle.

[0065] like Figures 1 to 12 As shown, the temperature adjustment unit 30 includes a heating element 31 and a temperature preset element 32 .

[0066] The heating element 31 includes a heating wire 311 and a heat-spreading film 312 .

[0067] The electric heating wires 311 are evenly and densely distributed on the two axial side surfaces inside the bag-shaped body 10, and are used to heat the infusion bag embedded in the bag-shaped body 10. The heating power of the electric heating wires 311 is w2.

[0068] The heat-spreading films 312 are arranged on the two axial side surfaces inside the bag-shaped body 10 and cover the surface of the heating wire 311. When the infusion bag is embedded in the bag-shaped body 10, the two heat-spreading films 312 are covered on the two axial side surfaces of the infusion bag. The heat-spreading films 312 are used to evenly conduct the heat generated by the heating wire 311 to the medicine in the infusion bag.

[0069] The temperature preset component 32 is integrated on the operating unit 70. The temperature preset component 32 has a temperature increase button 23a and a temperature decrease button 23b, which are respectively used to increase or decrease the preset temperature T1 of the liquid in the infusion bag when it enters the patient's vein.

[0070] like Figure 1 , Figure 2 , Fig. 9 , Fig.11 as well as Fig.12 As shown, the detection unit 40 includes a pressure sensor 41 , a first temperature sensor 42 , and a second temperature sensor 43 .

[0071] like Figures 1 to 12 As shown:

[0072] The pressure sensor 41 and the first temperature sensor 42 are both disposed on the side of the heat-spreading film 312 that contacts the infusion bag. The pressure sensor 41 and the first temperature sensor 42 are used to measure the pressure and the real-time temperature of the infusion bag embedded in the bag-shaped body 10, respectively, and thus output a corresponding pressure signal P 输液袋 and a first temperature signal T2.

[0073] The second temperature sensor 43 is disposed on the operating unit 70. The second temperature sensor 43 is used to measure the room temperature of the environment where the bag-shaped body is located in real time and output a corresponding second temperature signal T3.

[0074] The control unit 50 is connected to the pressurizing member 21 , the pressure sensor 41 , the heating wire 311 , the first temperature sensor 42 , the second temperature sensor 43 , the pressure regulating member 23 and the temperature preset member 32 .

[0075] The control unit 50 in this embodiment is arranged on the operating unit 70 (not shown in the figure) to improve the portability of the entire infusion auxiliary device 100 for an infusion bag; the signal line connecting the control unit 50 and the pressure regulating component 23 and the temperature preset component 32 in this embodiment is integrated in a circle around the periphery of the pipeline 22 (not shown in the figure), thereby improving the integration of the entire infusion auxiliary device 100 for an infusion bag.

[0076] The control unit 50 is a single chip microcomputer, and the control unit 50 receives the pressure signal P transmitted by the pressure sensor 41. 输液袋 , a first temperature signal T2 transmitted by the first temperature sensor 42, a second temperature signal T3 transmitted by the second temperature sensor 43, a preset temperature T1 adjusted by the temperature preset component 32, and a preset infusion rate v adjusted by the pressure regulating component 23 预设 .

[0077] The control unit 50 stores a temperature and pressure control model in advance.

[0078] Temperature and pressure control model for v 预设 and P 输液袋 The analysis and processing are performed to control the magnitude of the pressurizing power w1 of the pressurizing member 21, so that the first airbag 10d and the second airbag 10e are pressurized and expanded to squeeze the infusion bag, thereby increasing the infusion rate until the preset infusion rate v is reached. 预设 .

[0079] Effect of temperature and pressure control model on P 输液袋 , T1, T2 and T3 are analyzed and processed to control the heating power w2 of the heating wire 311, so that the temperature of the drug solution delivered to the patient's vein after the infusion bag is heated reaches T1.

[0080] The display screen 60 is connected to the control unit 50 and displays v in real time 预设 Specifically, the display screen 60 in this embodiment is integrated on the operating unit 70 .

[0081] The power supply unit (not shown) is connected to and supplies power to each power consumption unit of the infusion bag infusion auxiliary device 100. Specifically, the power supply unit in this embodiment is a removable storage battery, thereby enhancing the portability of the entire infusion bag infusion auxiliary device 100.

[0082] This embodiment further provides a method for constructing a temperature and pressure control model, which is used to construct the temperature and pressure control model pre-stored inside the control unit 50 mentioned in this embodiment.

[0083] The method for constructing the temperature and pressure control model in this embodiment includes the following steps:

[0084] S10, selecting an infusion bag of fixed volume and a corresponding infusion tube of fixed length and diameter.

[0085] S20, through actual measurement, the actual infusion rate v of the infusion bag is obtained 实际 The pressure P 输液袋 , and then 实际 and P 输液袋 The multiple corresponding values ​​of the MATLAB software are fitted to obtain a smooth curve relationship P 输液袋 =f1(v 实际 ).

[0086] In this step, the temperature and pressure control model controls the pressurization amplitude of the pressurizing member 21 so that the actual infusion rate v 实际 With the preset infusion rate v 预设 The same, so when v 预设 The preset pressure value of the corresponding infusion bag is less than the actual pressure value P 输液袋 When P, the pressurizing member 21 needs to be continuously pressurized, so the pressure control method of the temperature and pressure control model can be obtained, that is:输液袋 <f1(v 预设 ), w1>0.

[0087] S30, the temperature loss during the process of delivering the liquid in the infusion bag to the patient's vein via the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and control the single factor variable to conduct multiple groups of actual tests, and obtain the relationship between ΔT and v 实际 , T2 and T3 and fit them through MATLAB software to obtain a smooth four-dimensional surface relationship ΔT = f2 (v 实际 ,T2,T3).

[0088] S30, considering w2 as being determined only by the preset temperature T4=T1+ΔT and T2 of the infusion bag, controlling the single factor variable to conduct multiple groups of actual tests, obtaining multiple groups of corresponding values ​​of w2 and ΔT, T1 and T2, and fitting them through MATLAB software to obtain a smooth four-dimensional surface relationship w2=f3(ΔT,T1,T2), then w2=f3(ΔT,T1,T2)=f3[f2(v 实际 ,T2,T3),T1,T2],T4>T2.

[0089] S50, the temperature and pressure control model is constructed:

[0090]

[0091] In the above formula, v 实际 By P 输液袋 =f1(v 实际 ) is calculated by reverse calculation.

[0092] Usage and operation process of the infusion auxiliary device 100 for an infusion bag:

[0093] S01, embed the infusion bag in the bag-like body 10 through the opening 10a, and make the infusion port of the infusion bag pass through the through hole 10b, and then hang the bag-like body 10 at a desired position through the hanging ring 10c.

[0094] S02, by adjusting the pressure regulating member 23, the display screen 60 displays the corresponding preset infusion rate v of the infusion bag required to be preset. 预设 By adjusting the temperature preset component 32, the display screen 60 displays the corresponding required preset temperature T1 of the infusion bag medicine delivered to the patient's venous end.

[0095] S03, the pressure sensor 41 measures the real-time pressure of the infusion bag and outputs a pressure signal P 输液袋; The first temperature sensor 42 measures the real-time temperature of the infusion bag and outputs a first temperature signal T2; the second temperature sensor 43 measures the real-time room temperature and outputs a second temperature signal T3.

[0096] S04, the control unit 50 receives the pressure signal P 输液袋 , the first temperature signal T2, the second temperature signal T3, the preset temperature T1 and the preset infusion rate v 预设 .

[0097] The temperature and pressure control model preloaded in the control unit 50 is 预设 and P 输液袋 The analysis and processing are performed to control the magnitude of the pressurizing power w1 of the pressurizing member 21, so that the first airbag 10d and the second airbag 10e are pressurized and expanded to squeeze the infusion bag, thereby increasing the infusion rate until the preset infusion rate v is reached. 预设 .

[0098] Effect of temperature and pressure control model on P 输液袋 , T1, T2 and T3 are analyzed and processed to control the heating power w2 of the heating wire 311, so that the temperature of the drug solution delivered to the patient's vein after the infusion bag is heated reaches T1.

[0099] S05, when it is necessary to adjust the infusion rate and the infusion temperature of the infusion bag, by controlling and adjusting the pressure regulating component 23 and the temperature preset component 32, the control unit 50 can automatically control the pressurization intensity and heating power of the infusion auxiliary device 100 for the infusion bag, thereby ultimately automatically adjusting the infusion rate and the infusion temperature of the infusion bag.

[0100] <Example 2>

[0101] For the sake of convenience, in this embodiment, the same symbols are given to the same structures as those in Embodiment 1, and the same descriptions are omitted.

[0102] Fig.13 It is a structural assembly perspective view of an infusion auxiliary device for an infusion bag according to a second embodiment of the present invention.

[0103] like Fig.13 As shown, this embodiment provides an infusion auxiliary device 101 for an infusion bag, including a bag-shaped body 10', a pressure regulating unit 20', a temperature regulating unit 30, a detection unit 40, a control unit 50, a display screen 60 and a power supply unit (not shown in the figure).

[0104] The bag-shaped body 10 ′ has an opening 10 a , a through hole 10 b , a hanging ring 10 c , a first air bag 10 d , and a second air bag 10 e .

[0105] The pressure regulating part 20 ′ includes a pressurizing member 21 , a pipeline 22 ′ and a pressure regulating member 23 .

[0106] The bag-shaped body 10' and the pressure regulating part 20' in this embodiment are similar in structure to those in the bag-shaped body 10 and the pressure regulating part 20 in the first embodiment, and will not be described again. The only difference is that the first airbag 10d and the second airbag 10e are not connected to each other (the bag-shaped body 10' in this embodiment does not have the passage 10f as in the first embodiment), and the first airbag 10d and the second airbag 10e are respectively connected to the pressurizing member 21 through two pipes 22', and are separately pressurized by the pressurizing member 21.

[0107] The temperature adjustment unit 30, the detection unit 40, the control unit 50, the display screen 60 and the power supply unit (not shown in the figure) in this embodiment are generally similar to those in the embodiment 1 and will not be repeated.

[0108] Functions and Effects of the Embodiments

[0109] According to the embodiment, an infusion auxiliary device for an infusion bag includes: a bag-shaped body, one end of which has an opening along the axial direction for the infusion bag to be embedded therein, and the other end of which has a through hole for the infusion port of the infusion bag to pass through; a pressurizing member connected to the bag-shaped body, and used to perform adjustable pressurization on the infusion bag embedded in the bag-shaped body, and the pressurizing power is w1; a pressure sensor, which is arranged inside the bag-shaped body, and is used to measure the pressure of the infusion bag in real time and output a corresponding pressure signal P 输液袋 ; A heating element connected to the bag-like body, used to heat the infusion bag embedded in the bag-like body with adjustable power, and its heating power is w2; a first temperature sensor, arranged inside the bag-like body, used to measure the temperature of the infusion bag in real time and output a corresponding first temperature signal T2; a second temperature sensor, used to measure the room temperature of the bag-like body in real time and output a corresponding second temperature signal T3; a temperature and pressure preset component, including a temperature preset element and a pressure regulating element, which are respectively used for the user to adjust the preset temperature T1 of the drug solution in the infusion bag when it enters the patient's vein and the preset infusion rate v of the infusion bag 预设 ; A control unit is connected to the pressurizing element, the pressure sensor, the heating element, the first temperature sensor, the second temperature sensor and the temperature and pressure preset component. The control unit stores a temperature and pressure control model in advance. The temperature and pressure control model is based on v 预设 and P 输液袋 Control the size of w1 so that the actual infusion rate of the infusion bag reaches v 预设 The temperature and pressure control model is based on T1, T2, T3 and P 输液袋 Control the size of w2 so that the actual temperature of the liquid in the infusion bag when it is delivered to the patient's vein reaches T1; the display screen is connected to the control unit and is used to display v in real time 预设 , specific values ​​of T1, T2 and T3; and a power supply unit, which is connected to each power consumption unit of the infusion auxiliary device for the infusion bag and supplies power to it.

[0110] Therefore, the infusion auxiliary device for the infusion bag of this embodiment has the following beneficial effects:

[0111] (1) The infusion bag embedded therein can be automatically pressurized, thereby increasing the infusion rate of the infusion bag until the rate reaches a value preset by the user. The system has a high degree of automation and does not require manual pressurization. It is suitable for different infusion scenarios, thereby changing the pressurization amplitude of the infusion bag according to the patient's actual physical condition and degree of urgency, thereby quickly adjusting the infusion rate of the infusion bag.

[0112] (2) It can automatically heat the infusion bag embedded therein, thereby increasing the infusion temperature of the infusion bag until the temperature reaches the value preset by the user, with a high degree of automation. It is also suitable for different infusion scenarios (different ambient temperatures and patient physical needs), thereby adjusting different heating temperatures and effectively preventing patients from experiencing hypothermia symptoms.

[0113] (3) The display screen allows the user to observe the infusion bag's infusion speed, infusion temperature, ambient temperature and other values ​​in real time.

[0114] (4) The pressure P actually applied to the infusion bag by the pressurizing power w1 and heating power w2 of the infusion auxiliary device for the infusion bag 输液袋 Combined together, real-time feedback is provided between the heating and pressurizing processes and corresponding power changes are made, making the heating and pressurizing (accelerating the infusion rate of the infusion bag) process of the infusion auxiliary device for the infusion bag more precise and with smaller errors.

[0115] Furthermore, each of the two axial side surfaces of the bag-like body has a hollow interlayer, and the two hollow interlayers form a first airbag and a second airbag respectively. The pressurizing member is an air pump, which is connected to the first airbag and / or the second airbag and is used to inflate air therein so that the two axial side surfaces of the bag-like body expand, thereby squeezing the infusion bag.

[0116] Furthermore, the first airbag and the second airbag are connected through at least one passage penetrating between the layers of the bag-shaped body, and at least one of the first airbag or the second airbag is connected to the air pump through a pipeline. In Example 1, the air pressure between the first airbag and the second airbag is balanced, and the infusion bag can be squeezed and pressurized more evenly to speed up its infusion rate.

[0117] Furthermore, the first airbag and the second airbag are not connected to each other, and the first airbag and the second airbag are respectively connected to the air pump through a pipeline, and are pressurized by the air pump. In Example 2, the first airbag and the second airbag are arranged so that the first airbag and the second airbag can be expanded separately to squeeze and pressurize the infusion bag, thereby avoiding the situation that when one of them is damaged, the entire infusion auxiliary device for the infusion bag cannot be pressurized.

[0118] Furthermore, the heating element includes electric heating wires, which are evenly and densely distributed on the two axial sides of the bag-shaped body, and are used to heat the infusion bag embedded in the bag-shaped body. Such an arrangement has the following beneficial effects:

[0119] (1) The uniformly distributed electric heating wires can uniformly pressurize the infusion bag; (2) When the infusion bag auxiliary device pressurizes the infusion bag by expanding to increase the infusion rate, the bag-shaped body will expand and deform to a certain extent. Since the electric heating wire is used in this embodiment, it has good flexibility and deformation ability, so it can better match the expansion and deformation process of the bag-shaped body, thereby more efficiently and uniformly heating the liquid in the infusion bag.

[0120] Furthermore, the heating element also includes a heat-spreading film, which is arranged on the two axial side surfaces inside the bag-like body and covers the surface of the electric heating wire. When the infusion bag is embedded in the bag-like body, the two heat-spreading films are covered on the two axial side surfaces of the infusion bag. The heat-spreading film is used to evenly conduct the heat generated by the electric heating wire to the medicine in the infusion bag. The first temperature sensor is arranged on the side of the heat-spreading film that contacts the infusion bag, and the second temperature sensor is not in direct contact with the bag-like body. Such an arrangement has the following beneficial effects: (1) the heat-spreading membrane enables the heat generated by the electric heating wire in the infusion auxiliary device for the infusion bag to be more evenly conducted to the medicine in the infusion bag during the heating process; (2) the infusion auxiliary device for the infusion bag in this embodiment has the functions of pressurizing and heating the infusion bag at the same time. When the infusion auxiliary device for the infusion bag pressurizes the infusion bag by expanding to increase the infusion rate, the bag-like body will expand and deform to a certain extent. At this time, since the heat-spreading membrane itself has a certain flexibility, it can better match the expansion and deformation process of the bag-like body, thereby heating the medicine in the infusion bag more efficiently and evenly.

[0121] Furthermore, the display screen, the temperature preset component, the pressure regulating component, the second temperature sensor and the control unit are integrated on the same operating unit. Such an arrangement has the following beneficial effects: (1) the integration on the same operating unit improves the integration and portability of the entire infusion auxiliary device for the infusion bag; (2) it is convenient for the user to observe the temperature and pressure values ​​measured by the corresponding temperature sensor and pressure sensor, as well as the infusion rate and infusion temperature values ​​preset by the user.

[0122] Furthermore, the bag-shaped body is made of a transparent material, so that medical staff can observe the delivery of the liquid medicine in the infusion bag in real time, so as to understand the remaining amount of the liquid medicine.

[0123] Furthermore, one end of the bag-shaped body having an opening is provided with a hanging ring. Such arrangement can facilitate medical personnel to hang the infusion bag in a desired position using the infusion auxiliary device.

[0124] According to a method for constructing a temperature and pressure control model provided in this embodiment, it is used to construct any of the above-mentioned temperature and pressure control models, and comprises the following steps: S10, selecting an infusion bag of fixed volume and its corresponding infusion tube of fixed length and diameter; S20, obtaining the actual infusion rate v of the infusion bag through actual measurement. 实际 The pressure P 输液袋 , and then 实际 and P 输液袋 The multiple corresponding numerical values ​​of P are fitted to obtain a smooth curve relationship P 输液袋 =f1(v 实际 ), since the temperature and pressure control model controls the pressure amplitude of the pressurizing part, the actual infusion rate v 实际 With the preset infusion rate v 预设 The same, so when v 预设 The preset pressure value of the corresponding infusion bag is less than P 输液袋 When P, the pressurized part needs to be continuously pressurized, so the pressure control method of the temperature and pressure control model can be obtained, that is: 输液袋 <f1(v 预设 ), w1>0; S30, the temperature loss during the process of delivering the liquid in the infusion bag to the patient's vein via the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and control the single factor variable to conduct multiple groups of actual tests, and obtain the relationship between ΔT and v 实际 , T2 and T3 and fit them to obtain a smooth four-dimensional surface relationship ΔT = f2 (v 实际 ,T2,T3); S30, w2 is determined by the preset temperature T4=T1+ΔT and T2 of the infusion bag, and multiple groups of actual tests are performed by controlling the single factor variable to obtain multiple groups of corresponding values ​​of w2 and ΔT, T1 and T2 and fit them to obtain a smooth four-dimensional surface relationship w2=f3(ΔT,T1,T2), then w2=f3(ΔT,T1,T2)=f3[f2(v 实际 ,T2,T3),T1,T2], T4>T2; S50, the temperature and pressure control model is constructed:

[0125] In the above formula, v 实际 By P 输液袋 =f1(v 实际 ) is calculated in reverse order.

[0126] Therefore, the method for constructing the temperature and pressure control model in this embodiment has the following beneficial effects:

[0127] (1) The method of constructing a temperature and pressure control model by actually measuring the relationship between temperature, pressure and infusion rate and fitting the actual empirical model between the three variables has high practical application significance.

[0128] (2) Compared with the theoretical model calculated by physical methods, the model fitted after actual measurement has higher accuracy, and its reliability can be further improved as the amount of test data increases.

[0129] (3) The construction method of the temperature and pressure control model is simple and easy to implement, without having to rely on complex theoretical calculations.

[0130] (4) Construction method of temperature and pressure control model The heating power and pressurization power are calculated by the actual pressure P of the infusion bag. 输液袋 Combined together, the heating and pressurizing processes of the infusion auxiliary device for the infusion bag can provide real-time feedback to each other and make corresponding power changes, making the heating and pressurizing (accelerating the infusion rate of the infusion bag) process of the infusion auxiliary device for the infusion bag more precise and with smaller errors.

[0131] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An infusion auxiliary device for an infusion bag, characterized in that: include: The bag-shaped body has an opening at one end along the axial direction for the infusion bag to be embedded therein, and a through hole at the other end for the infusion port of the infusion bag to pass through; A pressurizing member connected to the bag-shaped body and used for adjustable pressurization of the infusion bag embedded in the bag-shaped body, with a pressurization power of w1; The pressure sensor is arranged inside the bag-shaped body, and is used to measure the pressure of the infusion bag in real time and output a corresponding pressure signal P 输液袋 ; A heating element connected to the bag-like body and used for heating the infusion bag embedded in the bag-like body with adjustable power, wherein the heating power is w2; A first temperature sensor, disposed inside the bag-shaped body, for measuring the temperature of the infusion bag in real time and outputting a corresponding first temperature signal T2; A second temperature sensor is used to measure the room temperature of the environment where the bag-shaped body is located in real time and output a corresponding second temperature signal T3; The temperature and pressure preset component includes a temperature preset component and a pressure regulating component, which are used for the user to adjust the preset temperature T1 of the liquid in the infusion bag when it enters the patient's vein and the infusion rate v of the infusion bag. 预设 ; A control unit is connected to the pressurizing element, the pressure sensor, the heating element, the first temperature sensor, the second temperature sensor and the temperature and pressure preset component. A temperature and pressure control model is pre-stored in the control unit. The temperature and pressure control model is based on the v 预设 and P 输液袋 Control the size of w1 so that the actual infusion rate of the infusion bag reaches v 预设 The temperature and pressure control model is based on T1, T2, T3 and P 输液袋 The value of w2 is controlled so that the actual temperature of the liquid medicine in the infusion bag when it is delivered to the patient's vein reaches T1; A display screen is connected to the control unit and is used to display v 预设 , specific values ​​of T1, T2 and T3; and The power supply unit is connected to each power consumption unit of the infusion auxiliary device for the infusion bag and supplies power to the power consumption units.

2. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, The two axial sides of the bag-shaped body each have a hollow interlayer, and the two hollow interlayers form a first airbag and a second airbag respectively. The pressurizing member is an air pump, which is connected to the first airbag and / or the second airbag and is used to inflate air therein so that the two axial side surfaces of the bag-like body expand, thereby squeezing the infusion bag.

3. The infusion auxiliary device for an infusion bag according to claim 2, characterized in that: in, The first airbag and the second airbag are not connected to each other, The first airbag and the second airbag are respectively connected to the air pump through pipelines, and are pressurized by air supplied by the air pump.

4. The infusion auxiliary device for an infusion bag according to claim 2, characterized in that: in, The first airbag and the second airbag are connected through at least one passage penetrating between the layers of the bag-shaped body. At least one of the first airbag or the second airbag is connected to the air pump through a pipeline.

5. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, The heating element comprises a heating wire, The electric heating wires are evenly and densely distributed on the two axial side surfaces inside the bag-shaped body, and are used to heat the infusion bag embedded in the bag-shaped body.

6. The infusion auxiliary device for an infusion bag according to claim 5, characterized in that: in, The heating element further comprises a heat-spreading film, The heat-spreading film is arranged on the two axial side surfaces inside the bag-shaped body and covers the surface of the heating wire. When the infusion bag is embedded in the bag-shaped body, the two heat-spreading films are coated on the two axial sides of the infusion bag, and the heat-spreading films are used to evenly conduct the heat generated by the heating wire to the liquid medicine in the infusion bag. The first temperature sensor is disposed on a side of the heat-spreading film that contacts the infusion bag. The second temperature sensor is not in direct contact with the bag-shaped body.

7. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, The display screen, the temperature preset component, the voltage regulating component, the second temperature sensor and the control unit are integrated on the same operating unit.

8. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, At least part of the bag-shaped body is a transparent area, which is used for medical staff to observe the delivery of the liquid medicine in the infusion bag in real time. One end of the bag-like body having the opening is provided with a hanging ring for hanging at a desired position.

9. A method for constructing a temperature and pressure control model, characterized in that: The method for constructing the temperature and pressure control model according to any one of claims 1 to 8 comprises the following steps: S10, selecting the infusion bag of fixed volume and the corresponding infusion tube of fixed length and diameter; S20, obtaining the actual infusion rate v of the infusion bag through actual measurement 实际 The pressure P 输液袋 , and then 实际 and P 输液袋 The multiple corresponding numerical values ​​of P are fitted to obtain a smooth curve relationship P 输液袋 =f1(v 实际 ), Since the temperature and pressure control model controls the pressurization amplitude of the pressurizing member, the actual infusion rate v 实际 With the preset infusion rate v 预设 The same, so when v 预设 The corresponding preset pressure value of the infusion bag is less than P 输液袋 , the pressurizing member needs to be continuously pressurized, so the pressure control method of the temperature and pressure control model can be obtained, that is: when P 输液袋 <f1(v 预设 ), w1>0; S30, the temperature loss during the process of delivering the liquid medicine in the infusion bag to the patient's vein via the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and control the single factor variable to conduct multiple groups of actual tests, and obtain the relationship between ΔT and v 实际 , T2 and T3 and fit them to obtain a smooth four-dimensional surface relationship ΔT = f2 (v 实际 ,T2,T3); S30, w2 is determined by the preset temperature T4=T1+ΔT and T2 of the infusion bag, and multiple groups of actual tests are performed by controlling the single factor variable to obtain multiple groups of corresponding values ​​of w2 and ΔT, T1 and T2 and fit them to obtain a smooth four-dimensional surface relationship w2=f3(ΔT,T1,T2), then w2=f3(ΔT,T1,T2)=f3[f2(v 实际 ,T2,T3),T1,T2],T4>T2; S50, constructing the temperature and pressure control model: In the above formula, v 实际 By P 输液袋 =f1(v 实际 ) is calculated by reverse calculation.

10. The infusion auxiliary device for an infusion bag according to claim 9, characterized in that: in, In step S10 to step S30, multiple groups of corresponding values ​​are fitted using MATLAB software.

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